Heddle frame



Nov. 14, 1967 B. R. KOCH 3,352,329 I HEDDLE FRAME Filed Oct. 14; 1965 2 Sheets-Sheet 1 Nov. 14, 1967 B. R. KOCH 3,352,329

HEDDLE FRAME Filed Oct. 14, 1965 2 Sheets-Sheet 2 United States Patent 3,352,329 HEDDLE FRAME Bernhard R. Koch, Horgenberg, Switzerland, assignor to Grob & Co. AG, Horgen, Switzerland Filed Oct. 14, 1965, Ser. No. 495,954 Claims priority, application Switzerland, Apr. 15, 1965, 5,330/65 6 Claims. (Cl. 139-92) The subject matter of the present invention is a heddle frame for a Weaving loom having heddle carrying rods adjustable on hollow frame staves. The rods are adjusted by means of positioning screws adjustable from the outer side of the frame staves, the said screws being in engagement with related heddle rod holders and the play of whose thread is compensated by compression springs.

It is now obvious that the prior known heddle frames of this type are no longer equal to the stresses which arise on modern high speed looms and serious amounts of wear and tear arise which endanger operational safety.

An object of the present invention is to provide means for the adjustment of the heddle carrying rods so constructed as to avoid the aforesaid disadvantage and at the same time simplify the assembly and maintenance of the mounting. Another object of the invention is to provide a mounting arrangement so designed that the adjustment of the rod position can be effected over a wide range from the outside of the heddle frame of a conventional positioning screw which does not protrude beyond the outer edge of the frame stave.

According to the invention the heddle frame is so constructed that the head of each positioning screw is held under an aperture in the outer edge of the frame stave by means of a bearing block, the latter being inserted or removed through a window in a side wall of the frame stave and removably held in a holder arranged in the frame stave with a compression spring compensating for play in the thread and at the same time securing the bearing block in its working position against displacement. This construction, according to the invention, of the heddle frame makes it possible to obtain the aforesaid advantages with simple means. The adjustment means explained will withstand tensile and compressive stresses, they can be mounted as a whole without recourse to screws and the like and the individual component parts are easily exchangeable when necessary.

The arrangement is conveniently so designed that a certain amount of play is present longitudinally of the frame stave.

Further objects and advantages of the invention will become apparent from the following description given by way of example only and with reference to the accompanying drawings in which:

FIG. 1 is an elevation of the upper frame stave of a heddle frame having an adjustable holder for the heddle carrying rod in accordance with the invention;

FIG. 2 is a section along the line II--II in FIG. '1;

FIG. 3 is an exploded view of the individual parts of the adjustable mounting of the invention omitting the bearing block;

FIG. 4 is an exploded view in section through the individual parts along the line IV-lV in FIG. 3; and

FIG. 5 is a view in perspective of the bearing block.

In the drawings, 1 identifies a hollow frame stave of the heddle frame, 2 the heddle carrying rod, and 3 the support member for the heddle carrying rod. A member 4 and a bearing block 5 disposed therein are located within the hollow frame stave 1 and the member 4 is secured in the frame stave by welding or with other means. The bearing block 5 supports a conventional screw 6 carrying a compression spring 7. A wear resistant 3,352,329 Patented Nov. 14, 1967 slide piece 8 conveniently made of synthetic material, for example the material known under the name Nylatron is located over the holder 3 for the heddle carrying rod and extends down over the sides thereof.

The bearing member 4 is secured to the opposed walls of the hollow stave frame 1 adjacent an aperture in at least one of said walls and is provided with a rectangular recess 13 in registry with said aperture. The bearing block 5 is shaped to be received in said rectangular recess of said bearing member through said aperture.

The assembly of the parts and their functioning is described with reference to FIGS. 3 and 4.

To assemble the mounting, the screw 6 is passed through the aperture 9 in the frame stave 1 and is located With its head 10 in a recess 11 in the member 4. The bearing block 5 is now inserted and pushed through the windowlike aperture 12 in the frame stave '1 into the recess 13 on the member 4. The bearing block 5 surrounds the screw 6 which is accommodated in a laterally extending groove 14 directed inwardly from one side of the block so that the screw head 10 is rotatably mounted on the bearing block 5 with the bearing block supported in the recess 11 of the member 4. To ensure that the bearing block 5 cannot fall out, the compression spring 7 is pushed onto the screw 6 until one end of said spring engages in the groove or base 15 in the bearing block 5.

The heddle carrying rod 2 is secured in a known manner, to the support member 3 which is in turn secured to the connecting piece 16 having a screw-threaded hole 17. The slide piece 8 is now jammed over the support member 3 and the connecting piece 16 in such a way that its bore 18 comes to lie on the threaded hole '17. The support member 3 together with the slide piece 8 is now guided through the aperture 9 on the frame stave 1 until the point 19 of the screw 6 engages, through the bore 18 of the slide sheet 8 in the threaded hole 17. A tool suitable for the type of screw is passed through an opening 20 in the frame stave 1 and the bore 21 on the holder 4 into the screw head 10. By turning the screw 6 this screws itself into the threaded hole 17. Thus, the support member 3 for the heddle carrying rod with the slide piece 8 is drawn into the aperture 9 in the frame stave 1 until the heddle carrying rod 2 and the frame stave 1 are the desired distance apart. In this way the distance between the heddle carrying rod 2 and the frame stave '1 can be regulated at any time within wide limits.

The compression spring 7 is tensioned on screwing in the screw 6 and, as already described, on the one hand secures the bearing block 5 against falling out and on the other hand presses the slide piece 8 on the desired position against the support member 3 for the heddle carrying rod. At a given distance from the threaded hole 17 a cylindrical nylon bolt 22 is let into the connection piece 16, and locks the screw 6.

The adjustable holding device just described provides several great advantages compared with known embodiments. Except for the support member for the heddle carrying rod n0 component parts project from the frame stave, so that damage to this projecting part itself and to adjacent parts as well as injuries to the operator are successfully avoided. In addition to this, the adjustment screw can be operated from the outer side of the frame member and is consequently readily accessible. The use of the slide piece 8 resistant to wear prevents the formation of rust which would fall onto the warp.

In the embodiment as described, the threaded hole in the connecting piece 16 can be made particularly long, thus reducing play. Furthermore any play in the thread is compensated by the strong pressure of the spring 7 so that the possibility of wear due to play is eliminated. The same spring 7 presses the bearing block 5 against the 3 screwhead so that here too play is taken up and wear prevented.

A further advantage of the embodiment as described lies in the fact that all component parts can be easily changed. For example if a new heddle carrying rod is required no securing means are present which are firmly screwed on the frame member.

The device described is also easy to dismantle and reassemble.

What I claim is:

1. A heddle frame comprising, a hollow apertured frame stave having opposed side walls with an aperture in at least one of said walls and an aperture at the inner edge to permit entry of and access to the mounting parts, heddle carrying rods adjustably mounted on said hollow frame stave, bearing members secured to said walls of said hollow frame stave adjacent one of said apertures, each said bearing member being provided with an inwardly directed recess opposite a corresponding aperture, a bearing block supported in the recess in said bearing member and adapted to be inserted and removed through said corresponding aperture, said bearing block being provided with a laterally extending slotted groove having an enlarged bore portion, said bearing member. being provided with an opening extending into said recess and an additional opening in registry with an opening in said hollow stave for receiving a tool, a screw having a tool engaging head extending through said opening in the bearing member and through said groove in the bearing block with its head supported in engagement with the upper surface of said bearing block, a compression spring mounted on said screw with one end received in the bore in said bearing block, a support member secured to said heddle carrying rod having a screw threaded opening in which the threaded end of said screw is received, said heddle carrying rods thus being secured to said hollow frame stave for adjustment relative thereto.

2. A mounting for a heddle carrying rod whereby the rod is adjustably mounted on a hollow frame stave of a heddleframe, said hollow frame stave having spaced parallel walls, said walls being provided with window openings, said mounting comprising a bearing member secured to and between said walls within said hollow frame stave in registry with at least one of said window openings, a bearing block supported in a recess in said bearing member, said bearing block having a recess for receiving a screw, a headed screw extending into the hollow frame stave through an aperture in one edge thereof, said screw being arranged to extend through an opening in said bearing member and into said groove in the bearing block.

3. A heddle frame comprising hollow frame staves having spaced parallel side walls, at least one of said walls being provided with an access opening, heddle carrying rods adjustably mounted on said hollow frame staves, bearing members mounted between said walls and secured in said hollow frame staves in general alignment with said access opening, each of the said bearing members being provided with a recess arranged in registry with said access opening, a bearing block adapted to be inserted through said opening and to be supported in said recess in said bearing member, a headed screw extending through an aperture in the bearing member and through. a groove in the bearing block withits head supported by engagement with the upper surface of said bearing block, a compression spring mounted on said screw, a support member secured to each heddle carrying rod and formed with a screw threaded opening in which the threads of said screw are received, the heddle carrying rod being adjusted by rotation of said screw.

4. A heddle frame according to claim 3, wherein said bearing block is formed with a channel around the face of the groove therein, said channel receiving an end of the compression spring to maintain the bearing block in position.

5. A heddle frame according to claim 4 wherein the part of the support member extending into the hollow frame stave is covered by a wear resistant anti-friction slide. piece.

6. A heddle frame with a mounting for a heddle carrying rod whereby the rod is adjustably mounted on a hollow frame stave of the heddle frame, said stave having spaced parallel walls with a window aperture in at least one of said walls, a bearing member mounted and secured between said walls in alignment with one of said window openings, said bearing member being provided with a recess extending inwardly fromone side thereof in registry with said window opening, a bearing block adapted to be inserted and removed from said recess and having an inwardly extending groove, a headed screw extending into the hollow frame stave between the walls thereof through an aperture in the inner edge thereof, said headed screw extending through a vertical hole in said bearing member and through said groove in the bearing block, a support member secured on the heddle carrying rod and extending into said last named aperture between the walls of said hollow frame stave, said support member being formed with a screwthreaded opening for receiving said headed screw, and a compression spring mounted on said headed screw with one end engaging said bearing block and the other end engaging said support member.

References Cited MERVIN STEIN, Primary Examiner.

J. KEE CHI, Assistant Examiner. 

2. A MOUNTING FOR A HEDDLE CARRYING ROD WHEREBY THE ROD IS ADJUSTABLY MOUNTED ON A HOLLOW FRAME STAVE OF A HEDDLE FRAME, SAID HOLLOW FRAME STAVE HAVING SPACED PARALLEL WALLS, SAID WALLS BEING PROVIDED WITH WINDOW OPENINGS, SAID MOUNTING COMPRISING A BEARING MEMBER SECURED TO AND BETWEEN SAID WALLS WITHIN SAID HOLLOW FRAME STAVE IN REGISTRY WITH AT LEAST ONE OF SAID WINDOW OPENINGS, A BEARING BLOCK SUPPORTED IN A RECESS IN SAID 